公开(公告)号：US4071755A

公开(公告)日：1978-01-31

申请号：US701702

申请日：1976-07-01

Applicant: Irwin R. Supernaw ,  Dan McCay Arnold ,  Arthur Jurgen Link

Inventor： Irwin R. Supernaw ,  Dan McCay Arnold ,  Arthur Jurgen Link

IPC: G01V5/06 ,  G01V5/00

CPC classification number: G01V5/06

Abstract: A technique for the in situ evaluation of the organic carbon content of earth formations penetrated by a well borehole is disclosed. The energy spectrum of natural gamma radiation occurring in earth formations penetrated by a well borehole is observed in energy regions corresponding to uranium, potassium and thorium. Quantitative evaluations of the relative abundances of these elements are made by comparing the observed spectra with standard gamma ray spectra. The relative abundances of these elements may then be interpreted in terms of the organic carbon content of earth formations by comparison with predetermined relationships found to exist therebetween.

Abstract translation: 公开了一种通过井眼穿透的地层有机碳含量进行原位评估的技术。 在对应于铀，钾和钍的能量区域中观察到在井眼穿透的地层中发生的天然γ辐射的能谱。 通过将观察到的光谱与标准伽马射线光谱进行比较，可以对这些元素的相对丰度进行定量评估。 然后这些元素的相对丰度可以根据发现存在于它们之间的预定关系与地层的有机碳含量进行比较。